Carthanc is the closest planet to the sun in the Scythian Solar System.
Little is known about the history of Carthanc. A Paragon research team was sent by Dr Grimm to the planet's surface as part of the Celestial Ascension operation. They discovered most of the planet was covered in volcanic mountain ranges. The ruins of fallen cities were also discovered, indicating without a doubt that Carthanc once sustained life. This information was never released publicly, other than in Dr Grimm's publicly maligned Ecliptic Prophecy. The general public is told by the Scythian government that "past life on Carthanc" is nothing more than a conspiracy theory and hoax.